(19)

(11)

EP 4 031 743 A1

(12)

(43) Date of publication: 27.07.2022 Bulletin 2022/30 (21) Application number: 20864813.9 (22) Date of filing: 16.09.2020

(51) International Patent Classification (IPC):  E21B 7/08(2006.01) (52) Cooperative Patent Classification (CPC): E21B 7/064; E21B 7/046; E21B 10/26 (86) International application number: PCT/IB2020/058600 (87) International publication number: WO 2021/053526 (25.03.2021 Gazette 2021/12)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 17.09.2019 ZA 201906123 (71) Applicant: Bischoff, Nicolas Jacobus 7195 Kleinmond (ZA)	(72) Inventor: Bischoff, Nicolas Jacobus 7195 Kleinmond (ZA) (74) Representative: JD&P Patent Attorneys Joanna Dargiewicz & Partners  Ul. Mysliborska 93A/50 03-185 Warszawa 03-185 Warszawa (PL)